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Lee GKC, Barbosa C, Andersen G, Ramirez CJ, Kornya M, Abrams-Ogg A, Morrison K, Diamantino G, Wood RD, Beeler-Marfisi J, Ampuero F, Tatiersky L, Bienzle D. Cyclic hematopoiesis in a mixed-breed dog: case report and brief review. J Vet Diagn Invest 2022; 34:1006-1009. [PMID: 35904319 DOI: 10.1177/10406387221115179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An 8-wk-old, male, mixed-breed puppy was adopted from a rescue organization. From the time of adoption, the puppy suffered episodes of illness affecting various organ systems, which resolved with supportive therapy but relapsed once medical therapy was discontinued. Review of the hematologic data revealed cyclic fluctuations in circulating blood cells. Cyclicity was most prominent in neutrophils, with recurrent severe neutropenia. Neutropenic episodes lasted 5-6 d, with regular cycles of 11-14 d between nadir neutrophil counts. Genetic testing determined that the patient was homozygous mutant for the frameshift mutation in the adaptor protein complex 3 β-subunit (AP3B1) gene, originally identified in gray collies with cyclic hematopoiesis (CH). Pedigree information was not available, but the patient's features were phenotypically distinct from those of collies. We describe here a case of the AP3B1 mutation in a mixed-breed dog that did not resemble a collie, undescribed previously, to our knowledge. Our findings indicate that the AP3B1 mutation and CH are present within the general canine population and are not restricted to collies.
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Affiliation(s)
- Gary K C Lee
- Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.,Current address: Idexx Laboratories, Rydalmere, NSW, Australia
| | | | | | | | - Matthew Kornya
- Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | | | | | | | - R Darren Wood
- Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | | | - Fernanda Ampuero
- Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | | | - Dorothee Bienzle
- Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Lee GKC, Bowal J, Beaulieu A, Iverson M, Jensen M, Mutsaers AJ, Foster RA, Wood RD. Pathology in Practice. J Am Vet Med Assoc 2022; 259:1-4. [PMID: 35560118 DOI: 10.2460/javma.21.01.0036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In collaboration with the American College of Veterinary Pathologists.
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Affiliation(s)
- Gary K C Lee
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Jacqueline Bowal
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Alexandra Beaulieu
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Melanie Iverson
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Monica Jensen
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Anthony J Mutsaers
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Robert A Foster
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Robert D Wood
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Lee GKC, Beeler-Marfisi J, Viel L, Piché É, Kang H, Sears W, Bienzle D. Bronchial brush cytology, endobronchial biopsy, and SALSA immunohistochemistry in severe equine asthma. Vet Pathol 2021; 59:100-111. [PMID: 34903109 PMCID: PMC8679176 DOI: 10.1177/03009858211048635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Horses with severe equine asthma (SEA), also known as heaves and recurrent airway
obstruction, have persistent neutrophilic inflammation of the lower airways.
Cytologic evaluation of bronchoalveolar lavage (BAL) fluid is commonly used to
confirm the clinical diagnosis of SEA. However, the utility of microscopic
assessment of bronchial brushings, endobronchial biopsies, and
immunohistochemical detection of disease-associated biomarkers for the diagnosis
of SEA remain poorly characterized. Salivary scavenger and agglutinin (SALSA)
has anti-inflammatory properties and downregulated gene expression in SEA;
therefore, it was investigated as a tissue biomarker for airway and systemic
inflammation. Six asthmatic and 6 non-asthmatic horses were exposed to an
inhaled challenge. Before and after challenge, samples of BAL fluid, bronchial
brushing, and endobronchial biopsy were collected. Location of SALSA in biopsies
was determined, and immunohistochemical label intensity was computed using image
analysis software. Serum amyloid A (SAA) was measured to assess systemic
inflammation. After challenge, neutrophil proportions were significantly higher
in asthmatic versus non-asthmatic horses in BAL fluid (least squares means, 95%
confidence interval: 80.9%, 57.2% to 93.1%, vs 3.6%, 1.1% to 10.7%) and in brush
cytology slides (39.5%, 7.7% to 83.6%, vs 0.2%, 0% to 2.3%), illustrating the
potential of brush cytology as an alternate modality to BAL for assessing
intraluminal inflammation. Bronchial histopathologic findings and intensity of
SALSA immunolabeling in surface and glandular epithelium were similar in
asthmatic and non-asthmatic horses, indicating limited changes in bronchial
tissue from the inhaled challenge. Increases in SAA indicated systemic
inflammation, but SALSA immunolabeling did not change significantly.
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Affiliation(s)
| | | | | | - Érica Piché
- University of Guelph, Guelph, Ontario, Canada
| | - Heng Kang
- University of Guelph, Guelph, Ontario, Canada
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Lee GKC, Carlton K, Foster RA, Aymen J, Beaufrère H, Wood RD. What is your diagnosis? Aspirate of a caudal intra-abdominal mass in a rabbit. Vet Clin Pathol 2021; 50:618-620. [PMID: 34528259 DOI: 10.1111/vcp.12989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Gary K C Lee
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Karen Carlton
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Robert Arthur Foster
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Jessica Aymen
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Hugues Beaufrère
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Robert Darren Wood
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Lee GKC, Diamantino G, Hawker W, Wood RD. What is your diagnosis? Aspirate of a lymph node in a dog. Vet Clin Pathol 2021; 50:603-605. [PMID: 34327731 DOI: 10.1111/vcp.12991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/16/2020] [Accepted: 12/27/2020] [Indexed: 11/29/2022]
Affiliation(s)
- Gary K C Lee
- Department of Pathobiology, University of Guelph, Guelph, ON, Canada
| | | | - William Hawker
- Department of Clinical Studies, University of Guelph, Guelph, ON, Canada
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Zahedi A, Lee GKC, Greay TL, Walsh AL, Blignaut DJC, Ryan UM. First report of Cryptosporidium parvum in a dromedary camel calf from Western Australia. Acta Parasitol 2018; 63:422-427. [PMID: 29654683 DOI: 10.1515/ap-2018-0049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 01/08/2018] [Indexed: 11/15/2022]
Abstract
Cryptosporidium is an important enteric parasite that can contribute large numbers of infectious oocysts to drinking water catchments. As a result of its resistance to disinfectants including chlorine, it has been responsible for numerous waterborne outbreaks of gastroenteritis. Wildlife and livestock play an important role in the transmission of Cryptosporidium in the environment. Studies conducted outside Australia have indicated that camels may also play a role in the transmission of zoonotic species of Cryptosporidium. Despite Australia being home to the world's largest camel herd, nothing is known about the prevalence and species of Cryptosporidium infecting camels in this country. In the present study, C. parvum was identified by PCR amplification and sequencing of a formalin-fixed intestinal tissue specimen from a one-week old dromedary camel (Camelus dromedarius). Subtyping analysis at the glycoprotein 60 (gp60) locus identified C. parvum subtype IIaA17G2R1, which is a common zoonotic subtype reported in humans and animals worldwide. Histopathological findings also confirmed the presence of large numbers of variably-sized (1-3 µm in diameter) circular basophilic protozoa - consistent with Cryptosporidium spp.- adherent to the mucosal surface and occasionally free within the lumen. Further analysis of the prevalence and species of Cryptosporidium in camel populations across Australia are essential to better understand their potential for contamination of drinking water catchments.
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Affiliation(s)
- Alireza Zahedi
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - Gary K C Lee
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - Telleasha L Greay
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - Audra L Walsh
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - David J C Blignaut
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - Una M Ryan
- School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
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